{"id":24132,"date":"2025-03-12T17:25:27","date_gmt":"2025-03-12T16:25:27","guid":{"rendered":"https:\/\/www.meslibellules.fr\/blog\/?p=24132"},"modified":"2025-03-12T17:35:54","modified_gmt":"2025-03-12T16:35:54","slug":"emergence-complete-de-pyrrhosoma-nymphula","status":"publish","type":"post","link":"https:\/\/www.meslibellules.fr\/blog\/2025\/03\/12\/emergence-complete-de-pyrrhosoma-nymphula\/","title":{"rendered":"Pyrrhosoma nymphula &#8211; \u00c9mergence compl\u00e8te"},"content":{"rendered":"\n<p>Cette \u00e9mergence compl\u00e8te de Pyrrhosoma nymphula s&rsquo;est d\u00e9roul\u00e9e sur mon petit bassin, \u00e0 Beaupr\u00e9au (F-49), le 12 avril 2011, entre 11 h 05 et 11 h 56 ; soit environ 50 minutes, ce qui est nettement plus long que celle montr\u00e9e \u00e0 la page pr\u00e9c\u00e9dente, 15 minutes. Je ne me souviens plus des conditions m\u00e9t\u00e9os,  mais il est vraisemblable que dans ce deuxi\u00e8me cas la temp\u00e9rature \u00e9tait plus basse.<br><br>Ma petite mare est un biotope presque parfait pour cette esp\u00e8ce que j&rsquo;y observe depuis presque vingt ans ; elle est bien v\u00e9g\u00e9talis\u00e9e, ensoleill\u00e9e 5 \u00e0 8 heures par jour, selon la saison, avec des arbustes puis de grands c\u00e8dres \u00e0 proximit\u00e9 imm\u00e9diate. Plusieurs types de plantes font de bons supports d&rsquo;\u00e9mergence. En raison de sa faible profondeur (80 cm au plus profond) et de son faible ensoleillement les \u00e9mergences ne sont jamais pr\u00e9coces par rapport \u00e0 celles constat\u00e9es en Anjou (\u00e0 ce sujet il faut lire Gribbin, Simon &amp; Thompson, David, (1991) (1)).<\/p>\n\n\n\n<p>La seule ombre au tableau pour les odonates est la pr\u00e9sence de carpes ko\u00ef, mais en 2011, elles \u00e9taient encore petites et permettaient la survie d&rsquo;un nombre appr\u00e9ciable de larves d&rsquo;odonates, venus pondre au hasard de leurs errances. On voit passer ces carpes sous forme de tache blanches, orange, jaunes ou rouges.<\/p>\n\n\n\n<div style=\"height:31px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n\n\n\n\n<div style=\"height:32px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p>Le diaporama est constitu\u00e9 de 29 photos que l&rsquo;on fait d\u00e9filer avec les fl\u00e8ches, lentement ou plus vite, donnant l&rsquo;illusion d&rsquo;un film acc\u00e9l\u00e9r\u00e9.<\/p>\n\n\n\n<p>Les fils blancs que l&rsquo;on aper\u00e7oit par instants entre l&rsquo;enveloppe larvaire et cette femelle Pyrrhosoma nymphula sont les trach\u00e9es a\u00e9riennes, c&rsquo;est-\u00e0-dire des conduites v\u00e9hiculant l&rsquo;air depuis les orifices externes de la larve vers l&rsquo;imago, connect\u00e9s des spiracles (ou stigmates) de la cuticule \u00e0 ceux du futur imago.<br>La photo ci-dessous montre cette m\u00eame femelle \u00e0 12 h 18. L&rsquo;\u00e9mergence ayant le plus souvent lieu \u00e0 l&rsquo;abri, c&rsquo;est \u00e0 dire au sein de la v\u00e9g\u00e9tation, au coeur des touffes de joncs ou ici de Populage des marais (Caltha Palustris), le jeune imago va monter le long de ltige pour trouver un espace plus large pour d\u00e9velopper ses ailes et surtout pouvoir s&rsquo;envoler. <\/p>\n\n\n\n<div class=\"wp-block-media-text is-stacked-on-mobile\" style=\"grid-template-columns:42% auto\"><figure class=\"wp-block-media-text__media\"><a href=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Pyrrhosoma-nymphula-femelle-fin-demergence-12-04-2011.webp\"><img decoding=\"async\" width=\"1150\" height=\"1504\" data-src=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Pyrrhosoma-nymphula-femelle-fin-demergence-12-04-2011.webp\" alt=\"Pyrrhosoma nymphula femelle fin d'\u00e9mergence, Beaupr\u00e9au (F-49), 12\/04\/2011\" class=\"wp-image-24170 size-full lazyload\" data-srcset=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Pyrrhosoma-nymphula-femelle-fin-demergence-12-04-2011.webp 1150w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Pyrrhosoma-nymphula-femelle-fin-demergence-12-04-2011-768x1004.webp 768w\" data-sizes=\"(max-width: 1150px) 100vw, 1150px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1150px; --smush-placeholder-aspect-ratio: 1150\/1504;\" \/><\/a><\/figure><div class=\"wp-block-media-text__content\">\n<p>Quatorze ans plus tard, les carpes sont toujours l\u00e0, un peu plus nombreuses, mais surtout beaucoup plus grosses, et je n&rsquo;assiste plus qu&rsquo;\u00e0 des \u00e9mergences de zygopt\u00e8res ; une ou deux centaines de Pyrrhosoma nymphula et quelques dizaines d&rsquo;Ischnura elegans.<br><br><br>De temps en temps des anisopt\u00e8res viennent survoler ma petite pi\u00e8ce d&rsquo;eau, certains se posent, mais comme l&rsquo;eau est bien claire et laisse voir les carpes, tous finissent certainement par lui jeter un regard d\u00e9daigneux et repartent trouver des lieux de reproduction plus accueillants pour leurs futurs rejetons.<br><br>\u00c9mergence compl\u00e8te de Pyrrhosoma nymphula femelle, Beaupr\u00e9au (F-49), 12\/04\/2011.<\/p>\n<\/div><\/div>\n\n\n\n<div style=\"height:34px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p style=\"font-size:13px\">1- Gribbin, Simon &amp; Thompson, David. (1991). <a href=\"https:\/\/www.researchgate.net\/publication\/225511166_Emergence_of_the_damselfly_Pyrrhosoma_nymphulaSulzer_Zygoptera_Coenagrionidae_from_two_adjacent_ponds_in_northern_England\">Emergence of the damselfly Pyrrhosoma nymphula (Sulzer) (Zygoptera: Coenagrionidae) from two adjacent ponds in northern England<\/a>. Hydrobiologia. 209. 123-131. <\/p>\n\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-buttons is-vertical is-layout-flex wp-container-core-buttons-is-layout-fe9cc265 wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/www.meslibellules.fr\/pagesweb\/coenagrionidae\/pyrrhosoma\/diaporama_emergence.php\">Retour<\/a><\/div>\n\n\n\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/www.meslibellules.fr\/blog\/pyrrhosoma-nymphula\/\">Accueil Pyrrhosoma nymphula<\/a><\/div>\n<\/div>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Cette \u00e9mergence compl\u00e8te de Pyrrhosoma nymphula s&rsquo;est d\u00e9roul\u00e9e sur mon petit bassin, \u00e0 Beaupr\u00e9au (F-49), le 12 avril 2011, entre 11 h 05 et 11 h 56 ; soit environ 50 minutes, ce qui est nettement plus long que celle montr\u00e9e \u00e0 la page pr\u00e9c\u00e9dente, 15 minutes. Je ne me souviens plus des conditions m\u00e9t\u00e9os, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"image","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[60,468],"tags":[508,381],"class_list":["post-24132","post","type-post","status-publish","format-image","hentry","category-coenagrionidae-france","category-pyrrhosoma-nymphula","tag-coenagrionidae-france","tag-france","post_format-post-format-image"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>\u00c9mergence compl\u00e8te de Pyrrhosoma nymphula - Mes Libellules<\/title>\n<meta name=\"description\" content=\"\u00c9mergence compl\u00e8te de Pyrrhosoma nymphula ; 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